Making pions with laser light
Journal Article - Open Access
Stanford University Menlo Park United States
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The interaction of high intensity short pulse laser beams with plasmas can accelerate electrons toenergies in excess of a GeV. These electron beams can subsequently be used to generate short-lived particles such as positrons, muons, and pions. In recent experiments, we have made the first measurements of pion production using all optical methods. In particular, we have demonstrated that the interaction of bremsstrahlung generated by laser driven electron beams with aluminum atomscan produce the long lived isotope of magnesium 27Mg which is a signature for pion pi production and subsequent muon decay. Using a 300 TW laser pulse, we have measured the generation of 15050 pions per shot. We also show that the energetic electron beam is a source of an intense, highly directional neutron beam resulting from , n reactions which contributes to the 27Mg measurement as background via the n, p process.
- Plasma Physics and Magnetohydrodynamics
- Lasers and Masers